Transcript Your First Radio

Technician Licensing Class
Your First Radio
Section 11
Valid July 1, 2014
Through
June 30, 2018
Your First Radio
•
Quick access to a favorite frequency on your
transceiver can be done by storing the frequency in a
memory channel.
T4B04
A disadvantage of the "rubber duck" antenna supplied
with most handheld radio transceivers is that it does not
T9A04
Your First Radio
•
A good reason not to use a "rubber duck" antenna
inside your car is that signals can be significantly weaker
than when it is outside of the vehicle.
T9A07
VHF/UHF Power
Amplifier
•
An RF power amplifier increases the low-power output
from a handheld transceiver.
T7A10
Your First Radio
PTT is the term used for the push to talk function /button
which switches between receive and transmit.
• T7A07
FM is the type of modulation most commonly used for
VHF and UHF voice repeaters.
• T8A04
The approximate bandwidth of a VHF repeater FM phone
signal is between 10 and 15 kHz.
• T8A09
FM is the type of modulation most commonly used for
VHF packet radio transmissions. (Packet is wireless data
transmission)
• T8A02
Your First Radio
The amount of deviation of an FM (as opposed to
PM) signal is determined by the amplitude of the
modulating signal
•
T2B05
•
T2B06
•
T4A02
When the deviation of an FM transmitter is
increased, Its signal occupies more bandwidth.
A computer can be used as part of an amateur radio
station for:
Logging contacts and contact information
Sending and/or receiving CW
Generating and decoding digital signals.
Take Aways
Take Aways
 PTT is the term used for the push to talk function /button
which switches between receive and transmit.
 A way to enable quick access to a favorite frequency on your
transceiver is to store the frequency in a memory channel.
 A disadvantage of the "rubber duck" antenna supplied with
most handheld radio transceivers is it does not transmit or
receive as effectively as a full-sized antenna.
 A good reason NOT to use a "rubber duck" antenna inside
your car is that signals can be significantly weaker than
when it is outside of the vehicle.
Take Aways
 An RF power amplifier increases the low-power
output from a handheld transceiver.
 FM is most commonly used for VHF and UHF voice
repeaters.
 The approximate bandwidth of a VHF repeater FM
phone signal is between 10 and 15 kHz.
 Frequency modulation (FM) is most commonly used
for VHF packet radio transmissions.
Take Aways
 The amount of deviation of an FM (as opposed to PM)
signal is determined by the amplitude of the modulating
signal
 When the deviation of an FM transmitter is increased, Its
signal occupies more bandwidth.
 A computer can be used as part of an amateur radio
station for all of these tasks
 Logging contacts and contact information
 Sending and/or receiving CW
 Generating and decoding digital signals.
Element 2 Technician Class
Question Pool
Your First Radio
Valid July 1, 2014
Through
June 30, 2018
T7A07
What is meant by the term “PTT”?
A. Pre-transmission tuning to reduce transmitter
harmonic emission
B. Precise tone transmissions used to limit
repeater access to only certain signals
C. A primary transformer tuner use to match
antennas
D. The push to talk function which switches
between receive and transmit
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T4B04
What is a way to enable quick access to a favorite
frequency on your transceiver?
A. Enable the CTCSS tones
B. Store the frequency in a memory
channel
C. Disable the CTCSS tones
D. Use the scan mode to select the desired
frequency
12
T9A04
What is a disadvantage of the "rubber duck"
antenna supplied with most handheld radio
transceivers?
A. It does not transmit or receive as effectively
as a full-sized antenna
B. It transmits a circularly polarized signal
C. If the rubber end cap is lost it will unravel
very quickly
D. All of these choices are correct
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T9A07
What is a good reason not to use a "rubber duck"
antenna inside your car?
A. Signals can be significantly weaker than
when it is outside of the vehicle
B. It might cause your radio to overheat
C. The SWR might decrease, decreasing the
signal strength
D. All of these choices are correct
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T7A10
What device increases the low-power output from
a handheld transceiver?
A.
B.
C.
D.
A voltage divider
An RF power amplifier
An impedance network
All of these choices is correct
15
T8A04
Which type of modulation is most commonly
used for VHF and UHF voice repeaters?
A.
B.
C.
D.
AM
SSB
PSK
FM
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T8A09
What is the approximate bandwidth of a VHF
repeater FM phone signal?
A.
B.
C.
D.
Less than 500 Hz
About 150 kHz
Between 10 and 15 kHz
Between 50 and 125 kHz
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T2B05
What determines the amount of deviation of an
FM (as opposed to PM) signal?
A. Both the frequency and amplitude of the
modulating signal
B. The frequency of the modulating signal
C. The amplitude of the modulating signal
D. The relative phase of the modulating signal
and the carrier
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T2B06
What happens when the deviation of an FM
transmitter is increased?
A.
B.
C.
D.
Its signal occupies more bandwidth
Its output power increases
Its output power and bandwidth increases
Asymmetric modulation occurs
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T8A02
What type of modulation is most commonly used
for VHF packet radio transmissions?
A.
B.
C.
D.
FM
SSB
AM
Spread Spectrum
20
T4A02
How might a computer be used as part of an
amateur radio station?
A. For logging contacts and contact
information
B. For sending and/or receiving CW
C. For generating and decoding digital signals
D. All of these choices are correct
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